These trucks come with a long drop cord for a backup.At ABF Indy, it was very common for the straight truck to do 300 miles a day with a electric lift gate. You need a power source that will last all day & then some. Winter time upper Michigan. You have an all electric straight truck with a lift gate. The temp is 0. 5 stops scheduled over 275 miles. Are you gonna make it? And if you break down or caught in a back up, is there enough battery to keep you warm & the truck rolling? von'